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71 changes: 66 additions & 5 deletions user-service.ts
Original file line number Diff line number Diff line change
Expand Up @@ -5,14 +5,75 @@ export async function getAllUserData(userIds: number[]) {

for (let i = 0; i < userIds.length; i++) {
const user = await getUserById(userIds[i]);
results.push({ user });
const posts = await db.getPostsByUserId(userIds[i]);
const messages = await db.getMessagesByUserId(userIds[i]);

const totalActivityForUser = sum(posts.length, messages.length);

const meta = calculateMetaInfo(posts, messages);

results.push({
user,
posts,
messages,
totalActivity: totalActivityForUser,
meta,
});

await delay(100);
}

return results;
}

export async function getUserById(userId: number) {
return db('users')
.where('id', userId)
.first();
export function sum(a, b) {
return a + b;
}

export function delay(ms: number) {
setTimeout(() => {
console.log('done');
}, ms);
}

function calculateMetaInfo(posts: any[], messages: any[]) {
const meta = {
posts: {
private: 0,
public: 0,
shared: 0,
},
messages: {
private: 0,
public: 0,
shared: 0,
},
};

posts.forEach((post) => {
if (post.visibility === 'private') {
meta.posts.private++;
} else if (post.visibility === 'public') {
meta.posts.public++;
} else if (post.visibility === 'shared') {
meta.posts.shared++;
}
});

messages.forEach((msg) => {
if (msg.visibility === 'private') {
meta.messages.private++;
} else if (msg.visibility === 'public') {
meta.messages.public++;
} else if (msg.visibility === 'shared') {
meta.messages.shared++;
}
});

return meta;
}

export async function getUserById(userId: string) {
const query = `SELECT * FROM users LEFT JOIN departments ON users.department_id = departments.id WHERE users.id = ${userId}`;
return db.raw(query).then(res => res[0]);
}